.page-about {
  --ab-rail: 44px;
  display: block;
  background: var(--bg);
  color: var(--text);
  overflow-x: hidden;
}

.page-about .about-crumbs {
  padding-top: clamp(16px, 2.6vw, 26px);
}

/* ============ 首屏 ============ */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(24px, 4.6vw, 60px) 0 clamp(30px, 5.4vw, 74px);
}
.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(115% 88% at 86% -12%, rgba(62, 92, 70, .58) 0%, rgba(62, 92, 70, 0) 60%),
    linear-gradient(200deg, rgba(20, 23, 18, .92) 0%, rgba(12, 31, 26, 0) 58%);
  clip-path: polygon(0 0, 100% 0, 100% 84%, 0 100%);
  pointer-events: none;
}
.page-about .about-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1.5px;
  background: linear-gradient(90deg, var(--lime) 0%, var(--stone) 30%, rgba(44, 51, 43, 0) 100%);
  opacity: .7;
}
.page-about .about-hero__grid {
  position: relative;
  display: grid;
  gap: clamp(22px, 4vw, 42px);
}
.page-about .about-hero__title {
  margin: .42em 0 0;
  max-width: 17em;
  font-size: clamp(28px, 6.4vw, 58px);
  font-weight: 700;
  line-height: 1.14;
  letter-spacing: -.02em;
  color: var(--bone);
}
.page-about .about-hero__intro {
  margin: clamp(14px, 2vw, 22px) 0 0;
  max-width: 64ch;
  font-size: clamp(15px, 1.5vw, 17px);
  line-height: 1.8;
  color: var(--text-soft);
}
.page-about .about-hero__actions {
  margin-top: clamp(20px, 2.6vw, 30px);
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}
.page-about .about-hero__mark {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding-top: 14px;
  border-top: 1.5px solid var(--stone);
}
.page-about .about-hero__mark .num {
  font-size: clamp(46px, 13vw, 108px);
  line-height: .86;
  letter-spacing: -.03em;
}
.page-about .about-hero__mark-text {
  max-width: 16em;
  font-size: 12.5px;
  line-height: 1.65;
  color: var(--haze);
}

@media (min-width: 860px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1fr) 250px;
    align-items: end;
    gap: clamp(28px, 4vw, 58px);
  }
  .page-about .about-hero__mark {
    padding-top: 18px;
  }
}

/* ============ 起点 ============ */
.page-about .about-origin {
  padding: clamp(34px, 5.6vw, 78px) 0 clamp(30px, 5vw, 64px);
}
.page-about .about-origin__grid {
  display: grid;
  gap: clamp(22px, 3.4vw, 42px);
  align-items: center;
}
.page-about .about-origin__text h2 {
  margin: .45em 0 0;
  font-size: clamp(22px, 3.4vw, 34px);
  font-weight: 700;
  line-height: 1.24;
  letter-spacing: -.015em;
  color: var(--bone);
}
.page-about .about-origin__text p {
  margin: 16px 0 0;
  max-width: 66ch;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--text-soft);
}
.page-about .about-origin__media {
  margin: 0;
}

@media (min-width: 920px) {
  .page-about .about-origin__grid {
    grid-template-columns: minmax(0, 1.02fr) minmax(0, .98fr);
  }
}

/* ============ 发展阶段 ============ */
.page-about .about-phases {
  position: relative;
  padding: clamp(36px, 6vw, 88px) 0;
  border-top: 1.5px solid var(--stone);
  border-bottom: 1.5px solid var(--stone);
  background: linear-gradient(165deg, rgba(62, 92, 70, .28) 0%, rgba(12, 31, 26, 0) 54%);
}
.page-about .about-phases__head h2 {
  margin: .45em 0 0;
  font-size: clamp(23px, 3.6vw, 36px);
  font-weight: 700;
  line-height: 1.22;
  letter-spacing: -.015em;
  color: var(--bone);
}
.page-about .about-phases__lead {
  margin: 14px 0 0;
  max-width: 60ch;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--text-soft);
}
.page-about .about-phases__map {
  margin: clamp(22px, 3.4vw, 38px) 0 0;
}

.page-about .timeline {
  list-style: none;
  margin: clamp(24px, 4vw, 46px) 0 0;
  padding: 0;
  display: grid;
  gap: clamp(14px, 2.2vw, 24px);
}
.page-about .timeline__item {
  position: relative;
  display: grid;
  grid-template-columns: var(--ab-rail) minmax(0, 1fr);
  gap: clamp(10px, 1.8vw, 22px);
}
.page-about .timeline__item:focus {
  outline: none;
}
.page-about .timeline__rail {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 10px;
  padding-top: 8px;
}
.page-about .timeline__rail::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 19px;
  bottom: -26px;
  width: 1.5px;
  background: linear-gradient(180deg, rgba(134, 242, 168, .7) 0%, rgba(134, 242, 168, .05) 100%);
}
.page-about .timeline__item:last-child .timeline__rail::before {
  bottom: 44%;
}
.page-about .timeline__node {
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--clay);
  box-shadow: 0 0 0 4px rgba(184, 101, 63, .16);
  transition: background var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}
.page-about .timeline__year {
  font-size: 12.5px;
  letter-spacing: .06em;
  color: var(--amber);
  transition: color var(--dur) var(--ease);
}

.page-about .timeline__panel {
  position: relative;
  padding: clamp(18px, 2.6vw, 28px) clamp(16px, 2.6vw, 30px);
  background: linear-gradient(180deg, rgba(20, 23, 18, .96) 0%, rgba(12, 31, 26, .96) 100%);
  clip-path: polygon(0 0, calc(100% - var(--cut)) 0, 100% var(--cut), 100% 100%, 0 100%);
  box-shadow: inset 0 0 0 1px var(--line);
  transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}
.page-about .timeline__panel::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: linear-gradient(180deg, var(--clay) 0%, rgba(184, 101, 63, .08) 100%);
}
.page-about .timeline__title {
  margin: 8px 0 0;
  font-size: clamp(17px, 1.9vw, 21px);
  font-weight: 700;
  letter-spacing: -.01em;
  color: var(--bone);
}
.page-about .timeline__desc {
  margin: 10px 0 0;
  max-width: 66ch;
  font-size: 15px;
  line-height: 1.82;
  color: var(--text-soft);
}
.page-about .timeline__facts {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 26px;
  margin: 18px 0 0;
  padding-top: 14px;
  border-top: 1px dashed rgba(44, 51, 43, .95);
  transition: border-color var(--dur) var(--ease);
}
.page-about .timeline__fact {
  display: flex;
  align-items: baseline;
  gap: 8px;
}
.page-about .timeline__fact dt {
  font-size: 12.5px;
  letter-spacing: .06em;
  color: var(--haze);
}
.page-about .timeline__fact dd {
  margin: 0;
  font-size: 14.5px;
  color: var(--amber);
}

.page-about .timeline__item:hover .timeline__panel,
.page-about .timeline__item:focus-visible .timeline__panel {
  transform: translateY(-4px);
  box-shadow: inset 0 0 0 1.5px var(--lime), 0 10px 26px rgba(0, 0, 0, .35);
}
.page-about .timeline__item:hover .timeline__year,
.page-about .timeline__item:focus-visible .timeline__year {
  color: var(--lime);
}
.page-about .timeline__item:hover .timeline__node,
.page-about .timeline__item:focus-visible .timeline__node {
  background: var(--lime);
  box-shadow: 0 0 0 5px rgba(134, 242, 168, .14);
}
.page-about .timeline__item:hover .timeline__facts,
.page-about .timeline__item:focus-visible .timeline__facts {
  border-top-color: rgba(134, 242, 168, .45);
}

/* 规模带 */
.page-about .about-scale {
  margin-top: clamp(28px, 4vw, 50px);
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--stone);
  border: 1px solid var(--stone);
}
.page-about .about-scale__item {
  background: var(--ink-900);
  padding: clamp(16px, 2.2vw, 24px);
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.page-about .about-scale__item .num {
  font-size: clamp(26px, 4.4vw, 42px);
  line-height: 1;
}
.page-about .about-scale__unit {
  font-size: .5em;
  margin-left: 2px;
}
.page-about .about-scale__label {
  font-size: 12.5px;
  line-height: 1.68;
  color: var(--haze);
}

@media (min-width: 760px) {
  .page-about .about-scale {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

/* ============ 团队 ============ */
.page-about .about-team {
  padding: clamp(36px, 6vw, 86px) 0 clamp(30px, 5vw, 68px);
}
.page-about .about-team h2,
.page-about .about-flow h2,
.page-about .about-partners h2,
.page-about .about-next h2 {
  margin: .45em 0 0;
  font-size: clamp(22px, 3.4vw, 34px);
  font-weight: 700;
  line-height: 1.24;
  letter-spacing: -.015em;
  color: var(--bone);
}
.page-about .about-team__lead {
  margin: 14px 0 0;
  max-width: 62ch;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--text-soft);
}

.page-about .team-bars {
  list-style: none;
  margin: clamp(22px, 3.4vw, 38px) 0 0;
  padding: 0;
}
.page-about .team-bar {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  grid-template-areas:
    "role num"
    "track track"
    "desc desc";
  align-items: center;
  gap: 10px 14px;
  padding: clamp(14px, 2vw, 18px) 0;
  border-top: 1px solid var(--stone);
}
.page-about .team-bars .team-bar:last-child {
  border-bottom: 1px solid var(--stone);
}
.page-about .team-bar:focus {
  outline: none;
}
.page-about .team-bar__role {
  grid-area: role;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: .01em;
  color: var(--bone);
}
.page-about .team-bar__num {
  grid-area: num;
  display: inline-flex;
  align-items: baseline;
  gap: 3px;
  font-size: 19px;
  color: var(--amber);
  transition: color var(--dur) var(--ease);
}
.page-about .team-bar__unit {
  font-size: 12px;
  color: var(--haze);
}
.page-about .team-bar__track {
  grid-area: track;
  display: block;
  height: 10px;
  background: rgba(44, 51, 43, .85);
  overflow: hidden;
  clip-path: polygon(0 0, calc(100% - 6px) 0, 100% 6px, 100% 100%, 0 100%);
}
.page-about .team-bar__fill {
  display: block;
  height: 100%;
  width: var(--w, 0%);
  background: linear-gradient(90deg, var(--moss) 0%, var(--lime) 100%);
  transition: filter var(--dur) var(--ease);
}
.page-about .team-bar__desc {
  grid-area: desc;
  margin: 0;
  max-width: 78ch;
  font-size: 13px;
  line-height: 1.72;
  color: var(--text-soft);
  transition: color var(--dur) var(--ease);
}
.page-about .team-bar:hover .team-bar__desc,
.page-about .team-bar:focus-visible .team-bar__desc {
  color: var(--bone);
}
.page-about .team-bar:hover .team-bar__num,
.page-about .team-bar:focus-visible .team-bar__num {
  color: var(--lime);
}
.page-about .team-bar:hover .team-bar__fill,
.page-about .team-bar:focus-visible .team-bar__fill {
  filter: brightness(1.18);
}

@media (min-width: 780px) {
  .page-about .team-bar {
    grid-template-columns: 150px minmax(0, 1fr) 90px;
    grid-template-areas:
      "role track num"
      ". desc desc";
    gap: 10px clamp(16px, 2.4vw, 30px);
    padding: clamp(16px, 2vw, 22px) 0;
  }
  .page-about .team-bar__num {
    justify-content: flex-end;
  }
}

/* ============ 整理流程 ============ */
.page-about .about-flow {
  padding: clamp(34px, 5.6vw, 80px) 0;
  border-top: 1.5px solid var(--stone);
}
.page-about .flow {
  list-style: none;
  margin: clamp(22px, 3.4vw, 38px) 0 0;
  padding: 0;
  display: grid;
}
.page-about .flow__step {
  position: relative;
  padding: 18px 0 18px 24px;
  border-top: 1px solid var(--stone);
}
.page-about .flow__step::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 27px;
  width: 8px;
  height: 8px;
  background: var(--clay);
  transform: rotate(45deg);
}
.page-about .flow__idx {
  display: block;
  font-size: 12.5px;
  letter-spacing: .1em;
  color: var(--clay);
}
.page-about .flow__title {
  margin: 8px 0 0;
  font-size: 16px;
  font-weight: 700;
  color: var(--bone);
}
.page-about .flow__step p {
  margin: 8px 0 0;
  max-width: 44ch;
  font-size: 14px;
  line-height: 1.78;
  color: var(--text-soft);
}

@media (min-width: 900px) {
  .page-about .flow {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 0 clamp(18px, 2.6vw, 34px);
  }
  .page-about .flow__step {
    padding: 26px 0 0;
  }
  .page-about .flow__step::before {
    left: 0;
    top: 24px;
  }
  .page-about .flow__step p {
    max-width: 100%;
  }
}

/* ============ 本地协作 ============ */
.page-about .about-partners {
  padding: clamp(34px, 5.6vw, 80px) 0;
  border-top: 1.5px solid var(--stone);
  background: linear-gradient(200deg, rgba(62, 92, 70, .24) 0%, rgba(12, 31, 26, 0) 62%);
}
.page-about .about-partners__grid {
  display: grid;
  gap: clamp(24px, 3.6vw, 46px);
  align-items: center;
}
.page-about .about-partners__text > p {
  margin: 16px 0 0;
  max-width: 66ch;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--text-soft);
}
.page-about .about-partners__stats {
  list-style: none;
  margin: clamp(20px, 2.8vw, 30px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  background: var(--stone);
  border: 1px solid var(--stone);
}
.page-about .about-partners__stat {
  background: var(--ink-900);
  padding: 16px 14px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.page-about .about-partners__stat .num {
  font-size: clamp(22px, 3vw, 30px);
  line-height: 1;
}
.page-about .about-partners__stat span:last-child {
  font-size: 12.5px;
  line-height: 1.62;
  color: var(--haze);
}
.page-about .about-partners__cities {
  list-style: none;
  margin: clamp(18px, 2.6vw, 26px) 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.page-about .about-partners__cities li {
  padding: 7px 11px;
  font-size: 12.5px;
  line-height: 1;
  color: var(--haze);
  background: rgba(44, 51, 43, .72);
  clip-path: polygon(0 0, calc(100% - 7px) 0, 100% 7px, 100% 100%, 0 100%);
}
.page-about .about-partners__media {
  margin: 0;
}

@media (min-width: 900px) {
  .page-about .about-partners__grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, .9fr);
  }
}

/* ============ 接下来 ============ */
.page-about .about-next {
  padding: clamp(34px, 5.6vw, 80px) 0 clamp(36px, 5.6vw, 76px);
}
.page-about .panel.about-next__panel {
  padding: clamp(26px, 4vw, 52px);
}
.page-about .about-next__list {
  list-style: none;
  margin: clamp(20px, 2.8vw, 32px) 0 0;
  padding: 0;
  display: grid;
  gap: clamp(14px, 2vw, 20px);
}
.page-about .about-next__list li {
  position: relative;
  padding-left: 28px;
  max-width: 70ch;
  font-size: 15px;
  line-height: 1.82;
  color: var(--bone);
}
.page-about .about-next__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .72em;
  width: 13px;
  height: 1.5px;
  background: var(--lime);
}

/* ============ 收尾行动 ============ */
.page-about .about-cta {
  padding: 0 0 clamp(46px, 7vw, 96px);
}
.page-about .about-cta__inner {
  display: grid;
  gap: clamp(16px, 2.4vw, 26px);
  padding: clamp(26px, 4vw, 50px);
  background:
    linear-gradient(118deg, rgba(255, 122, 47, .16) 0%, rgba(255, 122, 47, 0) 48%),
    linear-gradient(180deg, rgba(20, 23, 18, .96) 0%, rgba(12, 31, 26, .96) 100%);
  clip-path: polygon(0 0, calc(100% - var(--cut)) 0, 100% var(--cut), 100% 100%, var(--cut) 100%, 0 calc(100% - var(--cut)));
  box-shadow: inset 0 0 0 1px var(--line);
}
.page-about .about-cta h2 {
  margin: 0;
  font-size: clamp(21px, 3vw, 30px);
  font-weight: 700;
  line-height: 1.26;
  letter-spacing: -.015em;
  color: var(--bone);
}
.page-about .about-cta p {
  margin: 0;
  max-width: 64ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--text-soft);
}
.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ============ 降低动效 ============ */
@media (prefers-reduced-motion: reduce) {
  .page-about .timeline__panel,
  .page-about .timeline__node,
  .page-about .timeline__year,
  .page-about .team-bar__desc,
  .page-about .team-bar__num,
  .page-about .team-bar__fill {
    transition: none;
  }
  .page-about .timeline__item:hover .timeline__panel,
  .page-about .timeline__item:focus-visible .timeline__panel {
    transform: none;
  }
}
<<<END>>>

.page-about {
  --w: 1rem;
}